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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 11:16:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 11:16:09 -0700
commita9f4a7005fb1a0f6142cbb689e734621c61574d5 (patch)
tree151f02b324a0976ffd71f700ce97f8e39443a094 /arch/x86
parent37577505ec6e67d550aa5fb452c7b45a093cc7f3 (diff)
parent6bb2ff846f24fa6efee756e5e2a2b8433d65671e (diff)
Merge tag 'please-pull-mce-therm' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux
Pull thermal power-limit update from Tony Luck: "Thermal limit warnings are too scary and cause unnecessary concern" * tag 'please-pull-mce-therm' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux: x86 thermal: Disable power limit notification interrupt by default x86 thermal: Delete power-limit-notification console messages
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/cpu/mcheck/therm_throt.c43
1 files changed, 26 insertions, 17 deletions
diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index 2f3a7995e56a..98f2083832eb 100644
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -182,11 +182,6 @@ static int therm_throt_process(bool new_event, int event, int level)
this_cpu,
level == CORE_LEVEL ? "Core" : "Package",
state->count);
- else
- printk(KERN_CRIT "CPU%d: %s power limit notification (total events = %lu)\n",
- this_cpu,
- level == CORE_LEVEL ? "Core" : "Package",
- state->count);
return 1;
}
if (old_event) {
@@ -194,10 +189,6 @@ static int therm_throt_process(bool new_event, int event, int level)
printk(KERN_INFO "CPU%d: %s temperature/speed normal\n",
this_cpu,
level == CORE_LEVEL ? "Core" : "Package");
- else
- printk(KERN_INFO "CPU%d: %s power limit normal\n",
- this_cpu,
- level == CORE_LEVEL ? "Core" : "Package");
return 1;
}
@@ -220,6 +211,15 @@ static int thresh_event_valid(int event)
return 1;
}
+static bool int_pln_enable;
+static int __init int_pln_enable_setup(char *s)
+{
+ int_pln_enable = true;
+
+ return 1;
+}
+__setup("int_pln_enable", int_pln_enable_setup);
+
#ifdef CONFIG_SYSFS
/* Add/Remove thermal_throttle interface for CPU device: */
static __cpuinit int thermal_throttle_add_dev(struct device *dev,
@@ -232,7 +232,7 @@ static __cpuinit int thermal_throttle_add_dev(struct device *dev,
if (err)
return err;
- if (cpu_has(c, X86_FEATURE_PLN))
+ if (cpu_has(c, X86_FEATURE_PLN) && int_pln_enable)
err = sysfs_add_file_to_group(&dev->kobj,
&dev_attr_core_power_limit_count.attr,
thermal_attr_group.name);
@@ -240,7 +240,7 @@ static __cpuinit int thermal_throttle_add_dev(struct device *dev,
err = sysfs_add_file_to_group(&dev->kobj,
&dev_attr_package_throttle_count.attr,
thermal_attr_group.name);
- if (cpu_has(c, X86_FEATURE_PLN))
+ if (cpu_has(c, X86_FEATURE_PLN) && int_pln_enable)
err = sysfs_add_file_to_group(&dev->kobj,
&dev_attr_package_power_limit_count.attr,
thermal_attr_group.name);
@@ -353,7 +353,7 @@ static void intel_thermal_interrupt(void)
CORE_LEVEL) != 0)
mce_log_therm_throt_event(msr_val);
- if (this_cpu_has(X86_FEATURE_PLN))
+ if (this_cpu_has(X86_FEATURE_PLN) && int_pln_enable)
therm_throt_process(msr_val & THERM_STATUS_POWER_LIMIT,
POWER_LIMIT_EVENT,
CORE_LEVEL);
@@ -363,7 +363,7 @@ static void intel_thermal_interrupt(void)
therm_throt_process(msr_val & PACKAGE_THERM_STATUS_PROCHOT,
THERMAL_THROTTLING_EVENT,
PACKAGE_LEVEL);
- if (this_cpu_has(X86_FEATURE_PLN))
+ if (this_cpu_has(X86_FEATURE_PLN) && int_pln_enable)
therm_throt_process(msr_val &
PACKAGE_THERM_STATUS_POWER_LIMIT,
POWER_LIMIT_EVENT,
@@ -482,9 +482,13 @@ void intel_init_thermal(struct cpuinfo_x86 *c)
apic_write(APIC_LVTTHMR, h);
rdmsr(MSR_IA32_THERM_INTERRUPT, l, h);
- if (cpu_has(c, X86_FEATURE_PLN))
+ if (cpu_has(c, X86_FEATURE_PLN) && !int_pln_enable)
wrmsr(MSR_IA32_THERM_INTERRUPT,
- l | (THERM_INT_LOW_ENABLE
+ (l | (THERM_INT_LOW_ENABLE
+ | THERM_INT_HIGH_ENABLE)) & ~THERM_INT_PLN_ENABLE, h);
+ else if (cpu_has(c, X86_FEATURE_PLN) && int_pln_enable)
+ wrmsr(MSR_IA32_THERM_INTERRUPT,
+ l | (THERM_INT_LOW_ENABLE
| THERM_INT_HIGH_ENABLE | THERM_INT_PLN_ENABLE), h);
else
wrmsr(MSR_IA32_THERM_INTERRUPT,
@@ -492,9 +496,14 @@ void intel_init_thermal(struct cpuinfo_x86 *c)
if (cpu_has(c, X86_FEATURE_PTS)) {
rdmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h);
- if (cpu_has(c, X86_FEATURE_PLN))
+ if (cpu_has(c, X86_FEATURE_PLN) && !int_pln_enable)
wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT,
- l | (PACKAGE_THERM_INT_LOW_ENABLE
+ (l | (PACKAGE_THERM_INT_LOW_ENABLE
+ | PACKAGE_THERM_INT_HIGH_ENABLE))
+ & ~PACKAGE_THERM_INT_PLN_ENABLE, h);
+ else if (cpu_has(c, X86_FEATURE_PLN) && int_pln_enable)
+ wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT,
+ l | (PACKAGE_THERM_INT_LOW_ENABLE
| PACKAGE_THERM_INT_HIGH_ENABLE
| PACKAGE_THERM_INT_PLN_ENABLE), h);
else